guoweiM commented on a change in pull request #16:
URL: https://github.com/apache/flink-ml/pull/16#discussion_r739982645
##########
File path:
flink-ml-iteration/src/main/java/org/apache/flink/iteration/Iterations.java
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@@ -112,15 +145,400 @@ public static DataStreamList
iterateBoundedStreamsUntilTermination(
ReplayableDataStreamList dataStreams,
IterationConfig config,
IterationBody body) {
- Preconditions.checkArgument(
- config.getOperatorLifeCycle() ==
IterationConfig.OperatorLifeCycle.ALL_ROUND);
-
Preconditions.checkArgument(dataStreams.getReplayedDataStreams().size() == 0);
+ OperatorWrapper wrapper =
+ config.getOperatorLifeCycle() ==
IterationConfig.OperatorLifeCycle.ALL_ROUND
+ ? new AllRoundOperatorWrapper<>()
+ : new PerRoundOperatorWrapper<>();
- return IterationFactory.createIteration(
+ List<DataStream<?>> allDatastreams = new ArrayList<>();
+ allDatastreams.addAll(dataStreams.getReplayedDataStreams());
+ allDatastreams.addAll(dataStreams.getNonReplayedStreams());
+
+ Set<Integer> replayedIndices =
+ IntStream.range(0, dataStreams.getReplayedDataStreams().size())
+ .boxed()
+ .collect(Collectors.toSet());
+
+ return createIteration(
initVariableStreams,
- new DataStreamList(dataStreams.getNonReplayedStreams()),
+ new DataStreamList(allDatastreams),
+ replayedIndices,
body,
- new AllRoundOperatorWrapper(),
+ wrapper,
true);
}
+
+ @SuppressWarnings({"unchecked", "rawtypes"})
+ private static DataStreamList createIteration(
+ DataStreamList initVariableStreams,
+ DataStreamList dataStreams,
+ Set<Integer> replayedDataStreamIndices,
+ IterationBody body,
+ OperatorWrapper<?, IterationRecord<?>> initialOperatorWrapper,
+ boolean mayHaveCriteria) {
+ checkState(initVariableStreams.size() > 0, "There should be at least
one variable stream");
+
+ IterationID iterationId = new IterationID();
+
+ List<TypeInformation<?>> initVariableTypeInfos =
getTypeInfos(initVariableStreams);
+ List<TypeInformation<?>> dataStreamTypeInfos =
getTypeInfos(dataStreams);
+
+ // Add heads and inputs
+ int totalInitVariableParallelism =
+ map(
+ initVariableStreams,
+ dataStream ->
+ dataStream.getParallelism() > 0
+ ? dataStream.getParallelism()
+ : dataStream
+
.getExecutionEnvironment()
+ .getConfig()
+ .getParallelism())
+ .stream()
+ .mapToInt(i -> i)
+ .sum();
+ DataStreamList initVariableInputs = addInputs(initVariableStreams,
false);
+ DataStreamList headStreams =
+ addHeads(
+ initVariableStreams,
+ initVariableInputs,
+ iterationId,
+ totalInitVariableParallelism,
+ false,
+ 0);
+
+ DataStreamList dataStreamInputs = addInputs(dataStreams, true);
+ if (replayedDataStreamIndices.size() > 0) {
+ dataStreamInputs =
+ addReplayer(
+ headStreams.get(0),
+ dataStreams,
+ dataStreamInputs,
+ replayedDataStreamIndices);
+ }
+
+ // Create the iteration body. We map the inputs of iteration body into
the draft sources,
Review comment:
Creates?
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